874 SIR V. BROOKE ON A NEW ANTELOPE. [Dec. 3, 



with a thin pale yellow line, and slightly revolute on the sides. 

 Nuchal shield broad ; nuchal and vertebral shields with a narrow 

 central line along the whole length to the suture between the caudal 

 plates. Vertebral shields hexangular, broader than long, the front 

 the longest and narrowest, each marked with a narrow longitudinal 

 black-edged yellow line in the middle of each side of the shield, 

 terminating before it reaches the hinder margin, and slightly dilated 

 or notched on the front margin. Lateral shields each marked with 

 a subcentral curved black-edged narrow yellow line on the front edge 

 of the rather rough subposterior and subcentral areola, and giving off 

 a black-edged yellow branch from the lower front part to the margin. 

 Marginal plates with a central transverse yellow line, the dark 

 colour on each side of it very obscurely marked with pale curved 

 lines. Lower surface with the marginal scales pale, with a large 

 dark spot on the outer half of the sutures of the plates, which are 

 more or less confluent together, and irregularly shaped on the suture 

 of the hinder plates. Sternum flat, raised on the sides, the sternal 

 costal suture covered with a broad longitudinal black band extending 

 from end to end, and divided into two portions (the upper being 

 much the thinnest) by a longitudinal pale streak ; the sternum 

 marked with a nearly symmetrical brown rather irregular-shaped 

 disk, which is varied with streaks and spots, and with large white 

 spots on the sides, which are more or less confluent, giving it a very 

 peculiar appearance. 



4. On a new Species of Antelope living in the Society's 



Menagerie. By Sir Victor Brooke, Bart., F.Z.S.* 



[Eeceived October 28, 1872.] 



(Plate LXXV.) 



In May 1867, Mr. Charles Mosse presented to the Society a 

 small Antelope, which had been brought by him from Gambia. 

 The animal, which is a male, and is still living in the Society's 

 menagerie, was at first believed to be a specimen of Nanotragus 

 tragulus, but was subsequently referred to the Nanotragus montanus 

 of Riippell. During the early part of this year, however, I had the 

 opportunity of examining the type specimens of the latter species in 

 the Senckenbergian Museum at Frankfort, and perceived imme- 

 diately that the little Gambian Steinbock is very decidedly distinct 

 from either of the above-named species. For the sake of convenient 

 reference I will first give short diagnoses of these three closely allied 

 species of Nanotragus, and then proceed to describe the Gambian 

 Steinbock more in detail. 



1. Nanotragus tragulus (Afz.). 



Two well-marked varieties, the one deep rufous, the other silvery 



* Since reading this paper I have observed that the Antelope figured in the 

 'Knowsley Menagerie' (tab. 5) as Scophophorus monfanvs is evidently my 

 Nanotragus irigricaudatus. — V. B. 



